## LuxRender 0.9 crash when GPU Acceleration enabled

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### LuxRender 0.9 crash when GPU Acceleration enabled

Greetings,

I am new to LuxRender, having just purchased Reality for DAZ Studio. I've found that if I enable GPU Acceleration, LuxRender always crashes after it finishes reading in the scene file generated by Reality. This happens with every scene I've tried, including a very basic one with just a Genesis character and no environment/scenery.

The machine I am using is a Lenovo W520 laptop running 64-bit Windows 7 (fully patched) with an i7-2720QM CPU and Nvidia Quadro 1000M graphics card (it also has the Intel integrated graphics and does "smart switching" between the two GPUs depending on application). The Quadro driver version is 275.93 -- the latest available from Lenovo (because it's a laptop, the Nvidia releases won't install).

The crash occurs with the 0.9 bundle that Pret-a-3D distributes with Reality. I have also downloaded the most recent (Feb 04) weekly development build and the crash also occurs with that.

The error information from the crash from the Feb 04 weekly build when "View Details" is selected:

Code: Select all
Problem signature:  Problem Event Name:   APPCRASH  Application Name:   luxrender.exe  Application Version:   0.0.0.0  Application Timestamp:   4f2d6aeb  Fault Module Name:   luxrender.exe  Fault Module Version:   0.0.0.0  Fault Module Timestamp:   4f2d6aeb  Exception Code:   c0000005  Exception Offset:   00000000003bfc08  OS Version:   6.1.7601.2.1.0.256.4  Locale ID:   1033  Additional Information 1:   95e7  Additional Information 2:   95e74133074214d786d0cb8109c5a817  Additional Information 3:   b0b6  Additional Information 4:   b0b6c9ce8812f4244a0249b16ef9b7bf

Hopefully this is enough info for you all to look into whether this is a bug in LuxRender, or if not, at least point where things might be going wrong on my system.

Thanks
cwichura

Posts: 354
Joined: Sun Feb 12, 2012 11:31 pm

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

cwichura wrote:The machine I am using is a Lenovo W520 laptop running 64-bit Windows 7 (fully patched) with an i7-2720QM CPU and Nvidia Quadro 1000M graphics card (it also has the Intel integrated graphics and does "smart switching" between the two GPUs depending on application). The Quadro driver version is 275.93 -- the latest available from Lenovo (because it's a laptop, the Nvidia releases won't install).

is there a setting to "lock" it to the quadro and bypass the smart switching? I think recall this sort of feature causing some issues in the past.

Also, are you sure there is not some feature common to all of these scenes that hybrid doesn't like, and that is causing the crash? Displacement/microdisplacement, instancing, etc?
-Jason

J the Ninja

Posts: 2210
Joined: Wed May 19, 2010 9:54 pm
Location: Portland, USA

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

cwichura wrote:The Quadro driver version is 275.93 -- the latest available from Lenovo (because it's a laptop, the Nvidia releases won't install).

This could be the source of the problem, 275.93 are really old (NVIDIA has reached version 290.xx).

Posts: 4799
Joined: Sat Apr 19, 2008 6:04 pm
Location: Italy

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

J the Ninja wrote:is there a setting to "lock" it to the quadro and bypass the smart switching? I think recall this sort of feature causing some issues in the past.

I tried that, but I never saw the Nvidia monitor program show that luxrender was using it. I think it's crashing right when trying to initialize OpenCL so never gets far enough to show up as an active GPU task.

J the Ninja wrote:Also, are you sure there is not some feature common to all of these scenes that hybrid doesn't like, and that is causing the crash? Displacement/microdisplacement, instancing, etc?

I did try with a very basic scene that just has the Genesis figure loaded.
cwichura

Posts: 354
Joined: Sun Feb 12, 2012 11:31 pm

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

cwichura wrote:The Quadro driver version is 275.93 -- the latest available from Lenovo (because it's a laptop, the Nvidia releases won't install).

This could be the source of the problem, 275.93 are really old (NVIDIA has reached version 290.xx).

Unfortunately, my hands are tied on this one, since Lenovo is the gatekeeper here...
cwichura

Posts: 354
Joined: Sun Feb 12, 2012 11:31 pm

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

cwichura wrote:
cwichura wrote:The Quadro driver version is 275.93 -- the latest available from Lenovo (because it's a laptop, the Nvidia releases won't install).

This could be the source of the problem, 275.93 are really old (NVIDIA has reached version 290.xx).

Unfortunately, my hands are tied on this one, since Lenovo is the gatekeeper here...

I had the same problem with my HP laptop but, at the end, I was able to install the AMD desktop drivers while the AMD mobile driver version wasn't working (wired). You may want to try to do some test with NVIDIA Quadro/Geforce/Mobile drivers. However, be careful, you may end to mess your installation if you don't have experience with drivers, etc.

Try to download LuxMark (http://www.luxrender.net/wiki/LuxMark), if it doesn't work, it is very likely that LuxRender will not work too. The first step should be to find a way to install more recent drivers and to be able to run LuxMark.

Posts: 4799
Joined: Sat Apr 19, 2008 6:04 pm
Location: Italy

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

I downloaded LuxMark 2.0 from the link you provided, and all three of the sample scenes it includes ran without issue on my machine.
cwichura

Posts: 354
Joined: Sun Feb 12, 2012 11:31 pm

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

cwichura wrote:I downloaded LuxMark 2.0 from the link you provided, and all three of the sample scenes it includes ran without issue on my machine.

This is quite interesting (and a bit unexpected). What devices are listed on the right panel ? Is your GPU correctly listed ?

Posts: 4799
Joined: Sat Apr 19, 2008 6:04 pm
Location: Italy

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

It lists only the Nvidia Quadro 1000M.

Code: Select all
Quadro 1000MPlatform: NVIDIA CorporationPlatform Version: OpenCL 1.0 CUDA 4.0.1Type: GPUCompute Units: 2Clock: 1400MHzMax. Global Memory: 2030272 KbytesLocal Memory: 48 KbytesMax. Constant memory: 65 Kbytes
cwichura

Posts: 354
Joined: Sun Feb 12, 2012 11:31 pm

### Re: LuxRender 0.9 crash when GPU Acceleration enabled

Do you know if the LuxRender you are using is a 32bit or 64bit version ? Because there was a bug on some old version of the NVIDIA driver causing 32bit apps to crash on 64bit OS. It may be the version you are using.

Have you tried to run one of the LuxRender weekly builds (i.e. v0.9) ?